Jet BD-920N User manual

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JET

EQUIPMENT

&

TOOLS

OPERATOR

S

MANUAL

BD-920N

Belt

Drive

Bench

Lathe

(shown

with

optional

stand)

JET

EQUIPMENT

&

TOOLS,

INC.

A

WMH

Company

www.jettools.com

P.O.

BOX

1349

Auburn,

WA

98071-1349

e-mail

[email protected]

253-351-6000

Fax

253-939-8001

M-321373

2/02

Important

Information

1-YEAR

JET

offers

a

one-year

limited

LIMITED

WARRANTY

warranty

on

this

product

REPLACEMENT

PARTS

Replacement

parts

for

this

tool

are

available

directly

form

JET

Equipment

&

Tools.

To

place

an

order,

call

1-800-274-6848.

Please

have

the

following

information

ready:

1.

Visa,

MasterCard,

or

Discover

Card

number

2.

Expiration

date

3.

Part

number

listed

within

this

manual

4.

Shipping

address

other

than

a

Post

Office

box.

REPLACEMENT

PART

WARRANTY

JET

Equipment

&

Tools

makes

every

effort

to

assure

that

parts

meet

high

quality

and

durability

standards

and

warrants

to

the

original

retail

consumer/purchaser

of

our

parts

that

each

such

part(s)

to

be

free

from

defects

in

materials

and

workmanship

for

a

period

of

thirty

(30)

days

from

the

date

of

purchase.

PROOF

OF

PURCHASE

Please

retain

your

dated

sales

receipt

as

proof

of

purchase

to

validate

the

warranty

period.

LIMITED

TOOL

AND

EQUIPMENT

WARRANTY

JET

makes

every

effort

to

assure

that

its

products

meet

high

quality

and

durability

standards

and

warrants

to

the

original

retail

consumer/purchaser

of

our

products

that

each

product

be

free

from

defects

in

materials

and

workmanship

as

follows:

1

YEAR

LIMITED

WARRANTY

ON

THIS

JET

PRODUCT.

Warranty

does

not

apply

to

defects

due

directly

or

indirectly

to

misuse,

abuse,

negligence

or

accidents,

repairs

or

alterations

outside

our

facilities

or

to

a

lack

of

maintenance.

JET

LIMITS

ALL

IMPLIED

WARRANTIES

TO

THE

PERIOD

SPECIFIED

ABOVE

FROM

THE

DATE

THE

PRODUCT

WAS

PURCHASED

AT

RETAIL.

EXCEPT

AS

STATED

HEREIN,

ANY

IMPLIED

WARRANTIES

OR

MECHANTABILITY

AND

FITNESS

ARE

EXCLUDED.

SOME

STATES

DO

NOT

ALLOW

LIMITATIONS

ON

HOW

LONG

THE

IMPLIED

WARRANTY

LASTS,

SO

THE

ABOVE

LIMITATION

MAY

NOT

APPLY

TO

YOU.

JET

SHALL

IN

NO

EVENT

BE

LIABLE

FOR

DEATH.

INJURIES

TO

PERSONS

OR

PROPERY

OR

FOR

INCIDENTAL,

CONTINGENT,

SPECIAL

OR

CONSEQUENTIAL

DAMAGES

ARISING

FROM

THE

USE

OF

OUR

PRODUCTS.

SOME

STATES

DO

NOT

ALLOW

THE

EXCLUSION

OR

LIMITATION

OF

INCIDENTAL

OR

CONSEQUENTIAL

DAMAGES,

SO

THE

ABOVE

LIMITATION

OR

EXCLUSION

MAY

NOT

APPLY

TO

YOU.

To

take

advantage

of

this

warranty,

the

product

or

part

must

be

returned

for

examination,

postage

prepaid,

to

an

authorized

service

station

designated

by

our

Auburn

office.

Proof

of

purchase

date

and

an

explanation

of

the

complaint

must

accompany

the

merchandise.

If

our

inspection

discloses

a

defect,

JET

will

either

repair

or

replace

the

product

or

refund

the

purchase

price,

if

we

cannot

readily

and

quickly

provide

a

repair

or

replacement,

if

you

are

willing

to

accept

such

refund,

JET

will

return

repaired

product

or

replacement

at

JET’S

expense,

but

if

it

is

determined

there

is

no

defect,

or

that

the

defect

resulted

from

causes

not

within

the

scope

of

JET's

warranty,

then

the

user

must

bear

the

cost

of

storing

and

returning

the

product.

This

warranty

gives

you

specific

legal

rights,

and

you

have

other

rights,

which

vary,

from

state

to

state.

JET

Equipment

&

Tools

•

P.O.

Box

1349,

Auburn,

WA

98071-1349

•

(253)

351-6000

A

WARNING

1

Read

and

understand

the

entire

instruction

manual

before

operating

machine

2.

Always

wear

approved

safety

glasses/face

shields

while

using

this

machine

3.

Make

certain

the

machine

is

properly

grounded

4

Before

operating

the

machine,

remove

tie,

rings,

watches,

other

jewelry,

and

roll

up

sleeves

above

the

elbows

Remove

all

loose

clothing

and

confine

long

hair

Do

NOT

wear

gloves,

5

Keep

the

floor

around

the

machine

clean

and

free

of

scrap

material,

oil

and

grease

6

Keep

machine

guards

in

place

at

all

times

when

the

machine

is

in

use

If

removed

for

maintenance

purposes,

use

extreme

caution

and

replace

the

guards

immediately

7,

Do

NOT

over

reach

Maintain

a

balanced

stance

at

all

times

so

that

you

do

not

fall

or

lean

against

blades

or

other

moving

parts

8

Make

all

machine

adjustments

or

maintenance

with

the

machine

unplugged

from

the

power

source

9

Use

the

right

tool

Don't

force

a

tool

or

attachment

to

do

a

job

which

it

was

not

designed

for,

10,

Replace

warning

labels

if

they

become

obscured

or

removed

11,

Make

certain

the

motor

switch

is

in

the

OFF

position

before

connecting

the

machine

to

the

power

supply

12,

Give

your

work

undivided

attention.

Looking

around,

carrying

on

a

conversation,

and

"horse-play’

1

are

careless

acts

that

can

result

m

serious

injury.

13

Keep

visitors

a

safe

distance

from

the

work

area

14

Use

recommended

accessories;

improper

accessories

may

be

hazardous

15

Make

a

habit

of

checking

to

see

that

keys

and

adjusting

wrenches

are

removed

before

turning

on

the

machine.

16

Never

attempt

any

operation

or

adjustment

if

the

procedure

is

not

understood.

17.

Keep

fingers

away

from

revolving

parts

and

cutting

tools

while

in

operation.

18

Keep

belt

guard

in

place

and

in

working

order

19

Never

force

the

cutting

action

20

Do

not

attempt

to

adjust

or

remove

tools

during

operation.

21.

Always

keep

cutters

sharp

22.

Always

use

identical

replacement

parts

when

servicing.

23

Failure

to

comply

with

all

of

these

warnings

may

cause

serious

injury

22.

WARNING:

Some

dust

created

by

power

sanding,

sawing,

grinding,

drilling

and

other

construction

activities

contains

chemicals

known

to

cause

cancer,

birth

defects

of

other

reproductive

harm

Some

examples

of

these

chemicals

are

•

Lead

from

lead

based

paint

•

crystalline

silica

from

bricks

and

cement

and

other

masonry

products,

and

•

arsenic

and

chromium

from

chemically-

treated

lumber.

23.

Your

risk

from

those

exposures

varies,

depending

on

how

often

you

do

this

type

of

work.

To

reduce

your

exposure

to

these

chemicals:

work

in

a

well

ventilated

area,

and

work

with

approved

safety

equipment,

such

as

those

dust

masks

that

are

specifically

designed

to

filter

out

microscopic

particles

1

Table

of

Contents

Warnings.1

Table

of

Contents.2

Specifications.3

Contents

of

the

Shipping

Container.3

Set-Up

and

Preparation

for

Operation.3

General

Description.4-6

Controls.7

Operation.8-13

Adjustments.14-16

Electrical

Connections.16

Lubrication

Schedule.17

Parts

Lists

and

Breakdowns.18-41

Wiring

Diagram.42

CAUTION

The

three

jaw

chuck

and

the

face

plate

have

a

set

screw

on

their

flanges

that

secures

them

to

the

threaded

spindle.

Before

removing

the

three

jaw

chuck

or

the

faceplate,

remove

the

set

screw

completely

from

the

flange.

Failure

to

remove

the

set

screw

may

cause

damage

to

the

threads

on

the

spindle.

When

installing

either

the

three

jaw

chuck

or

the

faceplate,

tighten

the

set

screw

firmly

to

prevent

the

chuck

or

the

faceplate

from

coming

off

the

spindle

during

operation.

The

specifications

in

this

manual

are

given

as

general

information

and

are

not

binding.

JET

Equipment

and

Tools

reserves

the

right

to

effect,

at

any

time

and

without

prior

notice,

changes

or

alterations

to

parts,

fittings,

and

accessory

equipment

deemed

necessary

for

any

reason

whatsoever.

2

Specifications:

Stock

No.

Capacities:

Swing

Over

Bed.

Swing

Over

Cross

Slide.

Distance

Between

Centers.

Headstock:

Hole

Through

Spindle.

Spindle

Nose.

Taper

in

Spindle

Nose.

Spindle

Bearing

Type.

Number

of

Spindle

Speeds

Range

of

Spindle

Speeds.

Gear

Box:

Number

of

Longitudinal

Feeds

Range

of

Longitudinal

Feeds..

Number

of

Inch

Threads.

Range

of

Inch

Threads.

Number

of

Metric

Threads.

Range

of

Metric

Threads.

Leadscrew.

BD-920N

Compound

and

Carriage:

.321373

Toolpost

Type.Single

and

4-Way

Maximum

Tool

Size.1/2"

x

1/2"

.9"

Maximum

Compound

Slide

Travel.1-7/8"

.5-5/16"

Maximum

Cross

Slide

Travel.5"

.20"

Maximum

Carriage

Travel.16"

Tailstock:

.25/32"

Tailstock

Spindle

Travel.1-9/16"

1-1/2"

x

8

T.P

I.

Diameter

of

Tailstock

Spindle.1-1/16"

.MT-3

Taper

in

Tailstock

Spindle.MT-2

Tapered

Roller

Miscellaneous:

.6

Steady

Rest

Capacity.1/4"'-1-1/8"

.130-2000

RPM

Follow

Rest

Capacity.1/4"-1-7/8"

Length

of

Bed.32"

.27

Width

of

Bed.4-1/2"

.005"-

011"

Height

of

Bed.6-5/8"

.27

Overall

Dimensions..

37-1/2"Lx19-3/4"Wx15-3/4"H

.8-56

T

P.l

Main

Motor.3/4

HP,

1

Ph.,

115V

.11

Net

Weight

(approx.).235

lbs.

.05-3

0

mm

Shipping

Weight

(approx.).250

lbs

9/16"x16

T.P.I

Contents

of

the

Shipping

Container

Toolbox

Contents

1

Lathe

1

7"

Four-Jaw

Independent

Chuck

1

4"

Three-Jaw

Universal

Chuck

1

Faceplate

1

Four

Way

Tool

Post

1

Operator's

Manual

1

Warranty

Card

1

Steady

Rest

1

Follow

Rest

1

Single

Tool

Holder

3

Chuck

Jaws

2

Chuck

Keys

1

#1

Cross

Point

Screwdriver

1

#1

Flat

Blade

Screwdriver

1

5

pcs

Hex

Wrench

Set

1

8/10mm

Open

End

Wrench

1

MT-2

Center

1

MT-3

Center

1

28T

Gear

1

30T

Gear

1

36T

Gear

1

42T

Gear

1

45T

Gear

1

80T

Gear

Set

Up

and

Preparation

for

Operation

To

avoid

twisting

the

bed,

make

sure

the

location

to

which

the

lathe

is

bolted

is

absolutely

flat

and

level.

Place

a

machinist’s

level

on

the

bedways

and

check

for

level

side

to

side

and

front

to

rear

If

stand

mounted,

the

stand

must

be

fastened

to

the

floor.

Remove

rust

protected

from

all

surfaces

with

kerosene,

diesel

oil,

or

a

mild

solvent.

Do

not

use

gasoline,

paint

thinner,

or

lacquer

thinner

These

will

damage

painted

surfaces.

After

cleaning,

wipe

with

a

clean,

dry

cloth

and

cover

all

machined

surfaces

with

a

light

film

or

machine

oil.

3

General

Description

Lathe

Bed

The

lathe

bed

is

made

of

high

grade

iron.

By

combining

high

cheeks

with

strong

cross

ribs,

a

bed

of

low

vibration

and

rigidity

is

produced

(Fig.

1)

The

two

precision-

ground

V-slideways,

re-enforced

by

heat

hardening

and

grinding,

are

and

accurate

guide

for

the

carriage

and

tailstock.

The

main

motor

is

mounted

to

the

rear

of

the

bed.

(Fig.

2)

Headstock

The

headstock

is

cast

from

high

grade,

low

vibration

cast

iron

It

is

bolted

to

the

bed

with

four

screws

and

uses

four

adjusting

screws

for

alignment.

In

the

head,

the

large

main

spindle

is

mounted

on

two

precision

taper

roller

bearings.

The

hollow

spindle

is

a

Morse

taper

No

3

with

a

25/32"

bore.

(Fig

3)

A

quick

change

of

the

belt

can

be

accomplished

by

easing

the

tension

on

the

idler

(Fig

4)

To

protect

the

machine

against

accidental

damage,

a

clutch

is

fitted

to

the

reduction

pulley

at

the

130

R.P.M

speed.

Carriage

The

carriage

is

made

from

high

quality

cast

iron.

The

sliding

parts

are

smooth

ground.

(Fig.

5)

They

fit

the

V

on

the

bed

without

play.

The

lower

sliding

parts

can

be

easily

and

simply

adjusted.

The

cross

slide

is

mounted

on

the

carriage

and

moves

on

a

dove

tailed

slide.

Play

in

the

cross

slide

may

be

adjusted

with

the

gibs.

Move

the

cross

slide

with

it's

conveniently

positioned

handwheel.

There

is

a

graduated

collar

on

the

handwheel.

One

graduated

mark

equals

0.0254

millimeters

or

0.001

inches.

(Fig.

6)

The

top

slide,

mounted

on

the

cross

slide,

can

be

rotated

360°.

The

top

slide

and

the

cross

slide

travel

in

dove

tailed

slides

and

have

gibs,

adjustable

nuts,

and

graduated

collars.

A

four

way

tool

post

is

fitted

on

the

top

slide.

The

four

way

tool

post

can

be

converted

to

a

single

tool

holder

with

parts

enclosed

in

the

tool

box.

(Fig.

6)

For

accurate

facing

operations,

the

carriage

can

be

locked

by

tightening

the

hex

socket

cap

screw.

(A,

Fig.

7)

'

Apron

The

apron

is

mounted

on

the

bed.

A

half

nut

is

fitted

to

the

apron.

The

half

nut

gibs

can

be

adjusted

from

the

outside.

The

half

nut

is

engaged

by

the

half

nut

lever.

A

rack,

mounted

on

the

bed,

and

a

pinion

operated

by

handwheel

on

the

carriage

allow

for

quick

travel

of

the

apron.

(Fig.

8)

5

Fig.

8

Tailstock

The

tailstock

slides

on

a

V

way

and

can

be

clamped

at

any

location.

(Fig

9)

The

tailstock

has

a

heavy

duty

spindle

with

a

Morse

taper

No.

2

socket

and

a

graduated

scale.

The

spindle

can

be

clamped

at

any

location

with

a

clamping

lever.

The

spindle

is

moved

with

a

handwheel

at

the

end

of

the

tailstock.

Leadscrew

The

leadscrew

is

mounted

on

the

front

of

the

machine

bed.

It

is

connected

to

the

gear

box

at

the

left

for

automatic

feed

and

is

supported

by

bearing

on

both

ends.

The

nut

and

set

screw

on

the

right

end

are

designed

to

take

up

play

on

the

leadscrew.

(Fig.

10)

Gear

Box

The

gear

box

is

made

from

high

quality

cast

iron

and

is

mounted

on

the

left

side

of

the

machine

bed

(Fig.

11)

The

motor

drives

through

nine

changeable

speeds.

Always

raise

idler

to

the

disengaged

position

when

changing

speeds.

(A,

Fig.

12)

Drive

and

Electrical

Equipment

The

main

drive

is

provided

by

a

single

phase,

A.C.

motor

mounted

on

the

rear

of

the

lathe

bed.

(B,

Fig.

12)

The

forward-reverse

switch

(C,

Fig.

12)

is

mounted

on

the

top

of

the

electric

box.

The

motor

condenser

is

also

contained

in

this

box.

6

Fig.

9

Fig.

10

Fig.

12

Controls

1.

Forward/Reverse

Switch

2.

V-Belt

Tension

Lever

3.

Longitudinal

Travel

Handwheel

4.

Half-Nut

Lever

5.

Cross

Slide

Handwheel

6.

Top

Slide

Handwheel

7.

Longitudinal

Lock

Screw

8.

Tool

Post

9

Tailstock

Spindle

Handwheel

10.

Tailstock

Spindle

Clamping

Lever

11.

Tailstock

Locking

Screw

12.

Tailstock

Off-Set

Adjustment

13.

End

Gear

Cover

Lock

Screw

14.

Automatic

Feed

Lever

15.

Gear

Box

Quick

Change

Lever

7

Operation

Tool

Set-Up

The

cutting

angle

is

correct

when

the

cutting

edge

is

in

line

with

the

center

axis

of

the

work

piece.

The

correct

height

of

the

tool

can

be

achieved

by

comparing

the

tool

point

with

the

point

of

the

center

mounted

in

the

tailstock.

The

correct

tool

height

can

be

obtained

by

using

shims

under

the

tool.

(Fig.

13)

When

turning,

the

tool

has

a

tendency

to

bend

under

pressure.

For

best

results,

tool

overhang

should

be

kept

to

a

minimum

of

3/8"

or

less.

Manual

Turning

Apron

travel,

cross

travel,

and

top

slide

handwheels

can

be

operated

for

longitudinal

or

cross

feeding.

(Fig.

14)

Fig.

14

Longitudinal

Turning

with

Auto-Feed

Three

automatic

feeds

are

available.

(Fast

=

0.011

"/rev.,

medium

=

0.007"/rev.,

slow

=

0.005"/rev.)

These

can

be

set

by

altering

the

gear

wheel

combinations

(See

table

-

Fig.

15)

By

moving

lever

(A,

Fig.

16)

upward,

the

automatic

feed

is

engaged.

%

■

-fK

4

0

a-J

^

8

0

120-J

40

b-.

r

1

27

Lever

9

1

9

1

a

28

28

45

45

b

60

60

60

60

Feed

.005

.007

.007

.011

Fig.15

8